Question

I have an image from a blob database field.
is there any way to check the mime type of a field without saving?

getimagesize() and mime_content_type()

requires filename…

i want to do something like this:

<img \n" . 'src="data:image/gif;base64,' . $base64 .
          '" alt="base64 img" width="80" height="15" />

Answer 1

When you insert file data into your database, you really should be saving the MIME type with it. Detection isn’t perfect, and is at least slower.

In any case:

$mime_type = finfo_buffer($f, $imgdata, FILEINFO_MIME_TYPE);

From: Detecting image type from base64 string in PHP